Registration Dossier
Registration Dossier
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EC number: 240-085-3 | CAS number: 15956-58-8
Endpoint summary
Administrative data
Description of key information
Additional information
A wide range of long-term toxicity endpoints are available for the soil compartment that cover three trophic levels.
Chronic endpoints are available for soil macro-organisms, plants and soil micro-organisms. The following lowest endpoints for the different trophic levels are reported: a 28 -d NOEC of 157 mg Mn/kg soil dw for the annelid Enchytraeus sp., a 23 -d NOEC of 322 mg Mn/kg soil dw for the terrestrial plant Lactuca sativa, and a 28 -h NOEC of 207 mg Mn/kg soil dw for inhibition of soil nitrate formation rate.
In line with the REACH Guidance (R.10.6) the endpoints from soil studies need to converted from experimental soil to standard soil, taking into account differences in organic matter content (equation R.10-4). Therefore, the lowest overall NOEC is actually 251 mg Mn/kg soil (i.e. NOEC of 207 mg Mn/kg soil, corrected for organic carbon content of 2.8%).
It should also be noted that this value is considerably lower than the background concentration of manganese in European environments (428.6 mg/kg in soil; “Probabilistic Distribution of Manganese in European Surface Water, Sediment and Soil and Derivation of Predicted Environmental Concentrations (PEC)”, Parametrix, 2009 and supported by GEMAS data).
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